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C++ experimental platform event loop

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Olivier Goffart 2023-07-19 21:04:40 +02:00 • committed by Olivier Goffart
parent 21eff9cf10
commit de532d372a
4 changed files with 266 additions and 2 deletions
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67
api/cpp/platform.rs
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@ -106,6 +106,9 @@ struct CppPlatform {
window_factory: unsafe extern "C" fn(PlatformUserData, *mut WindowAdapterRcOpaque),
#[cfg(not(feature = "std"))]
duration_since_start: unsafe extern "C" fn(PlatformUserData) -> u64,
run_event_loop: unsafe extern "C" fn(PlatformUserData),
quit_event_loop: unsafe extern "C" fn(PlatformUserData),
invoke_from_event_loop: unsafe extern "C" fn(PlatformUserData, PlatformEventOpaque),
}
impl Drop for CppPlatform {
@ -130,14 +133,61 @@ impl Platform for CppPlatform {
fn duration_since_start(&self) -> core::time::Duration {
core::time::Duration::from_millis(unsafe { (self.duration_since_start)(self.user_data) })
}
fn run_event_loop(&self) -> Result<(), PlatformError> {
unsafe { (self.run_event_loop)(self.user_data) };
Ok(())
}
fn new_event_loop_proxy(&self) -> Option<Box<dyn i_slint_core::platform::EventLoopProxy>> {
Some(Box::new(CppEventLoopProxy {
user_data: self.user_data,
quit_event_loop: self.quit_event_loop,
invoke_from_event_loop: self.invoke_from_event_loop,
}))
}
}
struct CppEventLoopProxy {
user_data: PlatformUserData,
quit_event_loop: unsafe extern "C" fn(PlatformUserData),
invoke_from_event_loop: unsafe extern "C" fn(PlatformUserData, PlatformEventOpaque),
}
impl i_slint_core::platform::EventLoopProxy for CppEventLoopProxy {
fn quit_event_loop(&self) -> Result<(), i_slint_core::api::EventLoopError> {
unsafe { (self.quit_event_loop)(self.user_data) };
Ok(())
}
fn invoke_from_event_loop(
&self,
event: Box<dyn FnOnce() + Send>,
) -> Result<(), i_slint_core::api::EventLoopError> {
unsafe {
(self.invoke_from_event_loop)(
self.user_data,
core::mem::transmute::<*mut dyn FnOnce(), PlatformEventOpaque>(Box::into_raw(
event,
)),
)
};
Ok(())
}
}
unsafe impl Send for CppEventLoopProxy {}
unsafe impl Sync for CppEventLoopProxy {}
#[no_mangle]
pub unsafe extern "C" fn slint_platform_register(
user_data: PlatformUserData,
drop: unsafe extern "C" fn(PlatformUserData),
window_factory: unsafe extern "C" fn(PlatformUserData, *mut WindowAdapterRcOpaque),
#[allow(unused)] duration_since_start: unsafe extern "C" fn(PlatformUserData) -> u64,
run_event_loop: unsafe extern "C" fn(PlatformUserData),
quit_event_loop: unsafe extern "C" fn(PlatformUserData),
invoke_from_event_loop: unsafe extern "C" fn(PlatformUserData, PlatformEventOpaque),
) {
let p = CppPlatform {
user_data,
@ -145,6 +195,9 @@ pub unsafe extern "C" fn slint_platform_register(
window_factory,
#[cfg(not(feature = "std"))]
duration_since_start,
run_event_loop,
quit_event_loop,
invoke_from_event_loop,
};
i_slint_core::platform::set_platform(Box::new(p)).unwrap();
}
@ -187,6 +240,20 @@ pub extern "C" fn slint_platform_update_timers_and_animations() {
i_slint_core::platform::update_timers_and_animations()
}
#[repr(C)]
pub struct PlatformEventOpaque(*const c_void, *const c_void);
#[no_mangle]
pub unsafe extern "C" fn slint_platform_event_drop(event: PlatformEventOpaque) {
drop(Box::from_raw(core::mem::transmute::<PlatformEventOpaque, *mut dyn FnOnce()>(event)));
}
#[no_mangle]
pub unsafe extern "C" fn slint_platform_event_invoke(event: PlatformEventOpaque) {
let f = Box::from_raw(core::mem::transmute::<PlatformEventOpaque, *mut dyn FnOnce()>(event));
f();
}
type SoftwareRendererOpaque = *const c_void;
#[no_mangle]